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From "Konstantin Shvachko (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-12977) Add stateId to RPC headers.
Date Tue, 02 Jan 2018 20:13:00 GMT
Konstantin Shvachko created HDFS-12977:
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             Summary: Add stateId to RPC headers.
                 Key: HDFS-12977
                 URL: https://issues.apache.org/jira/browse/HDFS-12977
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: ipc, namenode
            Reporter: Konstantin Shvachko


stateId is a new field in the RPC headers of NameNode proto calls.
stateId is the journal transaction Id, which represents LastSeenId for the clients and LastWrittenId
for NameNodes. See more in [reads from Standby design doc|https://issues.apache.org/jira/secure/attachment/12902925/ConsistentReadsFromStandbyNode.pdf].



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